Siemens SINUMERIK 840D sl Function Manual page 342

M3: Coupled axes
8.4 Electronic gear (EG)
All paths are referred to the basic co-ordinate system BCS.
When an EG axis group is activated, it is possible to synchronize the leading axes and following
axis in relation to a defined starting position.
From the part program a gearbox group can be:
● defined,
● activated,
● deactivated,
● deleted.
Extensions
The influence of each of the 5 leading axes can be specified using a curve table as an
alternative to a transmission ratio (KF=numerator/denominator).
It is thus possible for each curve (except for the special case of a straight line) for the leading
axis to influence the following axis in a non-linear manner. The function can only be used with
EGONSYN.
The function EG can be activated with curve tables with EGON.
The function EGONSYNE is available for approaching the synchronized position of the
following axis with a specified approach mode.
For special applications, it may be advisable configure the position controller as a PI
controller.
Application faults
Knowledge of the control technology and measurements with servo trace are an absolute
prerequisite for using this function.
References:
● CNC Commissioning Manual: NCK, PLC, drive
● Function Manual, Basic Functions; Velocities, Setpoint-Actual Value Systems, Closed-
Loop Control (G2)
Coupling type
The following axis motion can be derived from either of the following:
● Setpoints of leading axes
● Actual values of leading axes
The reference is set in the definition call for the EG axis group:
EGDEF
(see Chapter "Definition of an EG axis group (Page 349)")
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CAUTION
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions